During the final trading week of June 2026, the global AI investment landscape experienced a dramatic upheaval. The trigger was straightforward—news broke that OpenAI would postpone its initial public offering (IPO) from 2026 to 2027. However, the magnitude of this shock far exceeded what a single event might warrant.
On June 26, SoftBank Group (9984.T) shares plunged more than 14% intraday, ultimately closing down 12.53%, wiping nearly 5.6 trillion yen (about $38 billion) off its market cap in a single day. During Asian trading on June 29, the stock continued to fall over 6%, dropping below the 6,000 yen mark to close at 5,848 yen. Over two days, the cumulative decline exceeded 17%, pushing the share price to its lowest level in more than a month.
At the same time, the crypto market also came under pressure. Bitcoin lost the key $60,000 level, trading at $59,356 with a 24-hour drop of over 1%, and briefly dipping to $58,888. Ethereum fell below $1,550. The total global crypto market cap dropped to around $2.15 trillion. AI-themed tokens saw broad-based weakness.
This was not an isolated market correction, but rather a structural vulnerability exposed in a highly interconnected AI investment network under stress. This article will break down the deeper logic behind this shock from three perspectives.
OpenAI’s IPO Delay: A Chain Reaction in Valuation Logic
The Micro Drivers Behind the Delay
OpenAI’s IPO postponement wasn’t due to deteriorating fundamentals, but rather a mismatch in capital market cycles. According to the New York Times, OpenAI CEO Sam Altman remains committed to a $1 trillion IPO valuation. Earlier, OpenAI completed a new funding round in early 2026, raising $122 billion and reaching a post-money valuation of $852 billion. The gap from $852 billion to $1 trillion—about 17%—is not insurmountable in a favorable growth narrative.
But the market environment has shifted. In June 2026, Elon Musk’s SpaceX completed the largest IPO in history, raising over $85 billion and debuting at a $1.77 trillion valuation. Since then, SpaceX shares have steadily declined from a high of $225.6 to $153 at Thursday’s close—a drop of over 30%. This price action sent a clear message: even the most sought-after tech assets face harsh revaluation in the secondary market.
Based on this, OpenAI’s banking advisors proposed two paths: first, delay the IPO to 2027 to pursue the $1 trillion target; second, lower the target valuation and accelerate the listing. Altman firmly rejected the latter.
This business logic is understandable—trading time for valuation headroom. But for SoftBank, which holds about 11% of OpenAI and has invested over $60 billion, this means a systemic delay in liquidity events.
SoftBank’s AI Portfolio: The Compounding Effect of Three Layers of Exposure
To understand why SoftBank’s losses were so severe, we need to dissect the structure of its AI holdings.
First Layer: Direct Holdings—Core Exposure to OpenAI. As of the end of March 2026, SoftBank had invested $34.6 billion in OpenAI. On April 1, 2026, SoftBank made an additional $10 billion investment. By October 2026, the market expects SoftBank’s total investment in OpenAI to reach around $65 billion. This is equivalent to 28% of SoftBank’s current market cap (about 35 trillion yen, or $230 billion). The IPO delay has effectively locked up the exit channel for these billions.
Second Layer: Indirect Holdings—Strategic Linkage with Arm. Arm is SoftBank’s most valuable listed subsidiary and the global monopoly in AI chip instruction set architectures. Arm’s valuation is highly dependent on sustained growth in AI computing demand. OpenAI’s delayed IPO and slower capital expenditure could lead to a repricing of AI chip demand curves. Arm’s share price pressure will feed through both SoftBank’s consolidated financials and its portfolio value.
Third Layer: Extended Exposure—Oracle and CoreWeave Ecosystem Ties. This is the dimension that the market may not have fully priced in during this selloff.
The Oracle/CoreWeave Triangle: Overlooked Interconnected Risks
SoftBank, Oracle, and CoreWeave form a classic "triangle dependency" structure.
In January 2025, OpenAI, Oracle, and SoftBank jointly announced the "Stargate Project," pledging $500 billion over four years to build US AI infrastructure. This plan is essentially a tripartite division of labor: OpenAI provides models and algorithms (demand side), Oracle supplies cloud computing and database infrastructure (compute supply side), and SoftBank contributes capital and Arm’s chip architecture (underlying technology).
CoreWeave is the more subtle link in this triangle. As a GPU cloud provider focused on AI compute, CoreWeave is a major recipient of OpenAI’s demand, while also relying on Oracle’s cloud network and SoftBank’s capital. Together, these three companies form a closed loop of "capital—compute—models."
The vulnerability of this loop is clear: any disruption at one node triggers a revaluation across the others.
OpenAI’s IPO delay likely means slower capital spending—no need to maintain hyper-growth just to support a pre-IPO narrative. This directly impacts Oracle’s cloud growth expectations and the demand trajectory for CoreWeave’s GPU rentals. Valuation pullbacks at Oracle and CoreWeave, in turn, hit SoftBank’s indirect exposure through the Vision Fund, creating a second wave of impact.
The June 26 selloff in SoftBank shares was, in essence, the market systematically discounting this "triangle dependency."
Vision Fund 3’s Valuation Reset: The Math of Private Company Discounts
The most far-reaching effect of this shock may be a systemic reset in Vision Fund 3’s valuation methodology.
SoftBank’s Vision Fund relies heavily on "comparable company valuation"—valuing private AI companies by referencing multiples from listed peers. When the IPO of OpenAI, its largest holding, is pushed back, the anchor for the entire valuation chain shifts.
Specifically:
First, the liquidity discount widens. Private assets already trade at a discount to public ones due to illiquidity. A delayed IPO extends the discount period, so the rate should rise. If the market shifts OpenAI’s IPO expectation from "6–12 months" to "12–24 months," the liquidity discount could widen from 15–20% to 30–40%.
Second, increased uncertainty premium on exit paths. OpenAI’s IPO delay isn’t due to company-specific issues, but to the market environment—a variable that’s inherently unpredictable. What if 2027’s market is no better? This uncertainty demands a higher risk premium.
Third, leverage effects amplify losses. SoftBank uses leverage in the Vision Fund. In bull markets, leverage magnifies gains; during valuation resets, it also amplifies losses. If OpenAI’s book value needs to be marked down, Vision Fund’s net asset value could shrink by multiples.
These three effects together explain why a single IPO delay could wipe out over 17% of SoftBank’s market cap—the market isn’t just pricing in "a six-month delay," but a wholesale reset of the valuation framework.
Crypto Market’s Synchronized Reaction: Cross-Asset Risk Sentiment Transmission
The crypto market’s weakness on June 29 was no coincidence.
Bitcoin lost the $60,000 level, Ethereum fell below $1,550, and SOL briefly dipped under $70. Global crypto market cap stood at $2.15 trillion. The Fear & Greed Index dropped to 12, deep in "extreme fear" territory.
This move mirrored the selloff in traditional AI tech stocks, signaling a cross-asset transmission of risk appetite. The correlation between crypto and AI stocks rose sharply in 2025–2026, with at least three transmission channels:
First, liquidity expectations. The AI investment boom was a key narrative supporting global risk assets in 2025–2026. When the flagship (OpenAI) hits an IPO roadblock, doubts about the "sustainability of AI capital spending" dampen risk appetite, and high-beta assets like crypto are hit first.
Second, capital allocation shifts. Some institutional funds rotate between AI stocks and crypto. When AI stocks are sold off, these funds may reduce overall risk exposure, not just rotate between asset classes.
Third, narrative coupling. AI and crypto both share the "technological disruption" narrative. When markets question the short-term returns of AI, crypto’s "store of value" or "tech platform" stories also come under scrutiny.
On-chain data shows that on June 29, BTC traded in a narrow range between $58,905 and $60,545, never reclaiming the $60,000 threshold. Technically, both daily and 4-hour MACD remained in a bearish crossover below the zero line, with expanding negative momentum and no bullish divergence. This suggests downside momentum remains strong, with the market in a classic "rebound—bear continuation" phase.
Conclusion
SoftBank’s $38 billion single-day wipeout may seem like a reaction to OpenAI’s IPO delay, but in reality, it was a systemic stress test of the highly coupled AI investment network.
The core feature of this network is that capital, compute, and models are not linearly related, but interact with multiplier effects. Any disturbance at one node gets amplified across direct holdings, indirect exposures, and ecosystem linkages. The IPO delay hit the first layer; Arm’s valuation linkage hit the second; Oracle and CoreWeave’s expectation reset hit the third. The combination drove SoftBank’s 17%+ decline.
For market participants, the key takeaway isn’t "how much further SoftBank could fall," but the deeper structural reality: as AI investment shifts from "narrative-driven" to "realization phase," markets will scrutinize valuation logic more rigorously than ever. Companies relying on "paper gains in unlisted assets" to support their market caps will face ongoing revaluation pressure.
The synchronized risk sentiment between crypto and AI stocks has further amplified the shock’s reach. With liquidity conditions still tight, cross-asset risk contagion may continue to spread.
Key variables to watch next include: whether OpenAI will provide any positive IPO timeline signals in the second half of 2026; how Vision Fund 3 will adjust its private asset valuation methods in the next earnings season; and whether Oracle and CoreWeave will revise their capital expenditure plans in response to OpenAI’s timing shift. Any change in these three variables could trigger a new round of valuation resets.
FAQ
Q1: How much has SoftBank actually invested in OpenAI?
As of the end of March 2026, SoftBank’s total investment in OpenAI was $34.6 billion. An additional $10 billion was invested in April 2026. By October 2026, total investment is expected to reach about $65 billion. SoftBank holds approximately 11% of OpenAI.
Q2: Why did OpenAI decide to delay its IPO?
The main reason is a mismatch between market conditions and valuation targets. Sam Altman insists on a $1 trillion IPO valuation, but recent tech stock volatility—such as SpaceX’s decline from $225.6 to $153 post-IPO—led banking advisors to recommend waiting until 2027 for a better shot at the target.
Q3: What does Vision Fund 3’s valuation reset mean?
Vision Fund relies on "comparable company valuation" for private AI companies. OpenAI’s IPO delay widens the liquidity discount, increases exit uncertainty, and, with leverage, amplifies losses. These three factors are driving a systemic revaluation of Vision Fund’s net asset value.
Q4: Why did the crypto market react to this event?
Mainly through three channels: the AI investment narrative setback lowers overall risk appetite; institutional funds reduce risk exposure across the board; and the shared "tech disruption" narrative between AI and crypto leads to simultaneous valuation scrutiny. Bitcoin’s drop below $60,000 and Ethereum’s fall under $1,550 on June 29 illustrate this.
Q5: What key variables should we watch going forward?
Three core variables: whether OpenAI provides positive IPO timeline signals in the second half of 2026; how Vision Fund 3 adjusts its private asset valuation methodology in the next earnings season; and whether Oracle and CoreWeave revise their capital expenditure plans due to OpenAI’s timing changes.
